Question

In mammals ventilation movement of lungs of lungs are governed by

Answer 1

Answer:

ventilation of lungs is carried out by Conducting part whereas exchange of gases is done by exchange part of the lungs, i.e.alveoli

Answer 2

Answer:

Mammals are also provided with costal muscles, which can move the rib cage. There are two sets - external and internal intercostal muscles. The intercostals cause movements of rib cage. This along with movement of diaphragm increases or decreases volume of air tight thoracic cavity.